Class 7 Maths: Large Numbers Around Us MCQs (NCERT)

110 practice questions on Large Numbers Around Us, a chapter in the NCERT Class 7 Mathematics textbook. Every question includes a written explanation. Try the samples below - the answer stays hidden until you ask for it.

Sample questions

Q1
medium
Two villages have $12{,}480$ and $9{,}530$ people. Estimate the total by rounding each population to the nearest thousand.
  1. A $21{,}000$
  2. B $22{,}000$
  3. C $23{,}000$
  4. D $20{,}000$
Show answer and explanation

Correct answer: B - $22{,}000$

The populations round to $12{,}000$ and $10{,}000$, giving an estimate of $22{,}000$. Rounding $9{,}530$ down to $9{,}000$ gives $21{,}000$, rounding both down gives $21{,}000$ as well, and $23{,}000$ comes from rounding $12{,}480$ up to $13{,}000$.
Q2
medium
Which of these numbers is the smallest?
  1. A $3{,}00{,}100$
  2. B $2{,}99{,}999$
  3. C $3{,}00{,}001$
  4. D $30{,}00{,}010$
Show answer and explanation

Correct answer: B - $2{,}99{,}999$

Three of the numbers have six digits and one has seven, so $30{,}00{,}010$ is the largest, not the smallest. Among the six-digit numbers, $2{,}99{,}999$ starts with $2$ while the others start with $3$, so it is the smallest even though it is packed with nines.
Q3
easy
Which of these figures is normally reported only as an estimate?
  1. A The marks a student scored in a test
  2. B The crowd at a village festival
  3. C The price printed on a biscuit packet
  4. D The number of students present in a classroom
Show answer and explanation

Correct answer: B - The crowd at a village festival

Nobody counts a festival crowd head by head, so such figures are always approximate. Marks, attendance and a printed price are all recorded exactly, because each is small enough or fixed enough to be known precisely.
Q4
medium
Which is greater, a crowd of $3$ crore or a crowd of $30$ million?
  1. A $3$ crore is ten times $30$ million
  2. B $3$ crore is greater
  3. C $30$ million is greater
  4. D They are the same size
Show answer and explanation

Correct answer: D - They are the same size

One crore equals $10$ million, so $3$ crore equals $30$ million and the two crowds are the same size. The trap is comparing the numbers $3$ and $30$ without noticing that the units differ by a factor of ten.
Q5
easy
One million is written as $1$ followed by how many zeros?
  1. A $6$
  2. B $7$
  3. C $9$
  4. D $5$
Show answer and explanation

Correct answer: A - $6$

One million is $1{,}000{,}000$, which is $1$ followed by six zeros. Five zeros give one lakh, seven zeros give one crore and nine zeros give one billion.
Q6
easy
Use the idea that $99 = 100 - 1$ to find $8 \times 99$.
  1. A $800$
  2. B $891$
  3. C $782$
  4. D $792$
Show answer and explanation

Correct answer: D - $792$

Eight hundreds less eight gives $800 - 8 = 792$. Subtracting $8$ twice gives $784$ and subtracting $18$ gives $782$, while $800$ forgets the subtraction altogether and $891$ is $9 \times 99$.

Practice the full Large Numbers Around Us bank free

All 110 questions with timed practice, instant scoring, and explanations. Free forever.

Start practicing I am a teacher - create a test

More Class 7 Maths chapters

A Peek Beyond the Point 125 Expressions using Letter-Numbers 105 Parallel and Intersecting Lines 115 Number Play 100 A Tale of Three Intersecting Lines 110 Working with Fractions 110